| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System.Linq;
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| 23 | using HeuristicLab.Common;
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| 24 | using HeuristicLab.Core;
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| 25 | using HeuristicLab.Data;
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| 26 | using HeuristicLab.Encodings.IntegerVectorEncoding;
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| 27 | using HeuristicLab.Operators;
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| 28 | using HeuristicLab.Optimization;
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| 29 | using HeuristicLab.Parameters;
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| 30 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 31 | using HeuristicLab.Problems.GeneralizedQuadraticAssignment.Common;
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| 32 |
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| 33 | namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment {
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| 34 | /// <summary>
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| 35 | /// An operator for analyzing the best solution of Generalized Quadratic Assignment Problems.
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| 36 | /// </summary>
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| 37 | [Item("Best GeneralizedQAP Solution Analyzer", "An operator for analyzing the best solution of Generalized Quadratic Assignment Problems.")]
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| 38 | [StorableClass]
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| 39 | public sealed class BestGQAPSolutionAnalyzer : SingleSuccessorOperator, IAnalyzer {
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| 40 |
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| 41 | public bool EnabledByDefault {
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| 42 | get { return true; }
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| 43 | }
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| 44 |
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| 45 | public LookupParameter<BoolValue> MaximizationParameter {
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| 46 | get { return (LookupParameter<BoolValue>)Parameters["Maximization"]; }
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| 47 | }
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| 48 | public LookupParameter<DoubleMatrix> DistancesParameter {
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| 49 | get { return (LookupParameter<DoubleMatrix>)Parameters["Distances"]; }
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| 50 | }
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| 51 | public LookupParameter<DoubleMatrix> WeightsParameter {
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| 52 | get { return (LookupParameter<DoubleMatrix>)Parameters["Weights"]; }
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| 53 | }
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| 54 | public LookupParameter<DoubleMatrix> InstallationCostsParameter {
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| 55 | get { return (LookupParameter<DoubleMatrix>)Parameters["InstallationCosts"]; }
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| 56 | }
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| 57 | public LookupParameter<DoubleArray> DemandsParameter {
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| 58 | get { return (LookupParameter<DoubleArray>)Parameters["Demands"]; }
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| 59 | }
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| 60 | public LookupParameter<DoubleArray> CapacitiesParameter {
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| 61 | get { return (LookupParameter<DoubleArray>)Parameters["Capacities"]; }
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| 62 | }
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| 63 | public LookupParameter<DoubleValue> TransportationCostsParameter {
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| 64 | get { return (LookupParameter<DoubleValue>)Parameters["TransportationCosts"]; }
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| 65 | }
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| 66 | public LookupParameter<DoubleValue> OverbookedCapacityPenaltyParameter {
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| 67 | get { return (LookupParameter<DoubleValue>)Parameters["OverbookedCapacityPenalty"]; }
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| 68 | }
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| 69 | public ScopeTreeLookupParameter<IntegerVector> AssignmentParameter {
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| 70 | get { return (ScopeTreeLookupParameter<IntegerVector>)Parameters["Assignment"]; }
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| 71 | }
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| 72 | public ScopeTreeLookupParameter<DoubleValue> QualityParameter {
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| 73 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Quality"]; }
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| 74 | }
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| 75 | public ScopeTreeLookupParameter<DoubleValue> FlowDistanceQualityParameter {
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| 76 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["FlowDistanceQuality"]; }
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| 77 | }
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| 78 | public ScopeTreeLookupParameter<DoubleValue> InstallationQualityParameter {
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| 79 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["InstallationQuality"]; }
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| 80 | }
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| 81 | public ScopeTreeLookupParameter<DoubleValue> OverbookedCapacityParameter {
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| 82 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["OverbookedCapacity"]; }
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| 83 | }
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| 84 | public LookupParameter<GQAPAssignment> BestSolutionParameter {
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| 85 | get { return (LookupParameter<GQAPAssignment>)Parameters["BestSolution"]; }
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| 86 | }
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| 87 | public ValueLookupParameter<ResultCollection> ResultsParameter {
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| 88 | get { return (ValueLookupParameter<ResultCollection>)Parameters["Results"]; }
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| 89 | }
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| 90 | public LookupParameter<DoubleValue> BestKnownQualityParameter {
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| 91 | get { return (LookupParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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| 92 | }
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| 93 | public LookupParameter<IntegerVector> BestKnownSolutionParameter {
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| 94 | get { return (LookupParameter<IntegerVector>)Parameters["BestKnownSolution"]; }
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| 95 | }
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| 96 | public ILookupParameter<StringArray> EquipmentNamesParameter {
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| 97 | get { return (ILookupParameter<StringArray>)Parameters["EquipmentNames"]; }
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| 98 | }
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| 99 | public ILookupParameter<StringArray> LocationNamesParameter {
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| 100 | get { return (ILookupParameter<StringArray>)Parameters["LocationNames"]; }
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| 101 | }
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| 102 |
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| 103 | [StorableConstructor]
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| 104 | private BestGQAPSolutionAnalyzer(bool deserializing) : base(deserializing) { }
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| 105 | private BestGQAPSolutionAnalyzer(BestGQAPSolutionAnalyzer original, Cloner cloner) : base(original, cloner) { }
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| 106 | public override IDeepCloneable Clone(Cloner cloner) {
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| 107 | return new BestGQAPSolutionAnalyzer(this, cloner);
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| 108 | }
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| 109 | public BestGQAPSolutionAnalyzer()
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| 110 | : base() {
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| 111 | Parameters.Add(new LookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem."));
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| 112 | Parameters.Add(new LookupParameter<DoubleMatrix>("Distances", "The distances between the locations."));
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| 113 | Parameters.Add(new LookupParameter<DoubleMatrix>("Weights", "The weights between the equipments."));
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| 114 | Parameters.Add(new LookupParameter<DoubleMatrix>("InstallationCosts", "The cost of installing equipment x at location y."));
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| 115 | Parameters.Add(new LookupParameter<DoubleArray>("Demands", "The demands of the equipments."));
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| 116 | Parameters.Add(new LookupParameter<DoubleArray>("Capacities", "The capacities at the locations."));
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| 117 | Parameters.Add(new LookupParameter<DoubleValue>("TransportationCosts", "The transportation cost represents the flow-unit per distance-unit cost factor. This value can also be set to 1 if these costs are factored into the weights matrix already."));
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| 118 | Parameters.Add(new LookupParameter<DoubleValue>("OverbookedCapacityPenalty", "The multiplier for the constraint violation when added to the quality."));
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| 119 | Parameters.Add(new ScopeTreeLookupParameter<IntegerVector>("Assignment", "The GQAP solutions from which the best solution should be analyzed."));
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| 120 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", "The qualities of the GQAP solutions which should be analyzed."));
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| 121 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("FlowDistanceQuality", "The flow-distance qualities of the GQAP solutions which should be analyzed."));
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| 122 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("InstallationQuality", "The installation qualities of the GQAP solutions which should be analyzed."));
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| 123 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("OverbookedCapacity", "The overbooked capacities of the GQAP solutions which should be analyzed."));
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| 124 | Parameters.Add(new LookupParameter<GQAPAssignment>("BestSolution", "The best GQAP solution."));
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| 125 | Parameters.Add(new ValueLookupParameter<ResultCollection>("Results", "The result collection where the best GQAP solution should be stored."));
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| 126 | Parameters.Add(new LookupParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this GQAP instance."));
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| 127 | Parameters.Add(new LookupParameter<IntegerVector>("BestKnownSolution", "The best known solution of this GQAP instance."));
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| 128 | Parameters.Add(new LookupParameter<StringArray>("EquipmentNames", "A list of names that describes the equipments."));
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| 129 | Parameters.Add(new LookupParameter<StringArray>("LocationNames", "A list of names that describes the locations."));
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| 130 | }
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| 131 |
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| 132 | public override IOperation Apply() {
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| 133 | var assignments = AssignmentParameter.ActualValue;
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| 134 | var qualities = QualityParameter.ActualValue;
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| 135 | var equipmentNames = EquipmentNamesParameter.ActualValue;
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| 136 | var locationNames = LocationNamesParameter.ActualValue;
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| 137 | var flowDistanceQualities = FlowDistanceQualityParameter.ActualValue;
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| 138 | var installationQualities = InstallationQualityParameter.ActualValue;
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| 139 | var overbookedCapacities = OverbookedCapacityParameter.ActualValue;
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| 140 | var distances = DistancesParameter.ActualValue;
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| 141 | var weights = WeightsParameter.ActualValue;
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| 142 | var installationCosts = InstallationCostsParameter.ActualValue;
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| 143 | var demands = DemandsParameter.ActualValue;
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| 144 | var capacities = CapacitiesParameter.ActualValue;
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| 145 | var transportationCosts = TransportationCostsParameter.ActualValue;
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| 146 | var overbookedCapacityPenalty = OverbookedCapacityPenaltyParameter.ActualValue;
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| 147 | var results = ResultsParameter.ActualValue;
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| 148 | var maximization = MaximizationParameter.ActualValue.Value;
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| 149 | var bestKnownQuality = BestKnownQualityParameter.ActualValue;
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| 150 |
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| 151 | int bestIndex;
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| 152 | var tmp = qualities.Select((x, index) => new { Index = index, Value = x.Value });
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| 153 | if (maximization) bestIndex = tmp.SelectMax(x => x.Value).Index;
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| 154 | else bestIndex = tmp.SelectMin(x => x.Value).Index;
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| 155 |
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| 156 | if (bestKnownQuality == null || HasSolutionImproved(bestKnownQuality.Value, qualities[bestIndex].Value, maximization)) {
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| 157 | BestKnownQualityParameter.ActualValue = new DoubleValue(qualities[bestIndex].Value);
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| 158 | BestKnownSolutionParameter.ActualValue = (IntegerVector)assignments[bestIndex].Clone();
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| 159 | }
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| 160 |
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| 161 | GQAPAssignment assignment = BestSolutionParameter.ActualValue;
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| 162 | if (assignment == null) {
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| 163 | assignment = new GQAPAssignment((IntegerVector)assignments[bestIndex].Clone(), (DoubleValue)qualities[bestIndex].Clone(), flowDistanceQualities[bestIndex], overbookedCapacities[bestIndex], installationQualities[bestIndex], equipmentNames, locationNames, distances, weights, installationCosts, demands, capacities, transportationCosts, overbookedCapacityPenalty);
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| 164 | assignment.Distances = distances;
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| 165 | BestSolutionParameter.ActualValue = assignment;
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| 166 | results.Add(new Result("Best GQAP Solution", assignment));
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| 167 | } else {
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| 168 | if (HasSolutionImproved(assignment.Solution.Quality.Value, qualities[bestIndex].Value, maximization)) {
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| 169 | assignment.Solution = new GQAPSolution((IntegerVector)assignments[bestIndex].Clone(),
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| 170 | (DoubleValue)qualities[bestIndex].Clone(), (DoubleValue)flowDistanceQualities[bestIndex].Clone(),
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| 171 | (DoubleValue)installationQualities[bestIndex].Clone(), (DoubleValue)overbookedCapacities[bestIndex].Clone());
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| 172 | assignment.EquipmentNames = equipmentNames;
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| 173 | assignment.LocationNames = locationNames;
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| 174 | assignment.Distances = distances;
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| 175 | assignment.Weights = weights;
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| 176 | assignment.InstallationCosts = installationCosts;
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| 177 | assignment.Demands = demands;
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| 178 | assignment.Capacities = capacities;
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| 179 | assignment.TransportationCosts = transportationCosts;
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| 180 | assignment.OverbookedCapacityPenalty = overbookedCapacityPenalty;
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| 181 | }
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| 182 | }
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| 183 |
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| 184 | return base.Apply();
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| 185 | }
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| 186 |
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| 187 | private static bool HasSolutionImproved(double oldQuality, double quality, bool maximization) {
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| 188 | return maximization && oldQuality < quality || !maximization && oldQuality > quality;
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| 189 | }
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| 190 | }
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| 191 | }
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